Egyptian star Adel Imam was offered the role before Mahmoud AbdulAziz, yet he requested a fundamental change in the script to be in chronological order instead of the flashbacks. The series starts with ElHagan's death and funeral. Imam said that this should be the final scene. His request was rejected by Salih Morsi and Mahmoud AbdelAziz took the role.
The real name of the real life Egyptian spy on whom the series was based was Refaat Al-Gammal (also known as Jack Bitton in Israel). He spent 17 years performing clandestine operations in Israel. Egyptian General Intelligence Directorate, claims that he moved to Israel as an Egyptian Intelligence asset in 1956.